Because butter is only 80% approximately of fat, you need more butter than regular shortening, so yes, it is 16 ounces shortening plus 6 ounces butter OR 26 ounces all butter. I have to figure out a way to make this a little more clear...

Click Ellen's Kitchen Updates
to request updates, suggest new topics or report a broken link, comment, or question. Put
"updates" in the subject line if you are requesting updates. PLEASE send questions separately from
update requests.